Uploading from Shutterfly to imac

Hello Jstougard,

Thank you for reaching out in Apple Support Communities. We understand you're unable to upload photos from the Photos app on your Mac to Shutterfly. We can help point you in the right direction.

We recommend to verify, that the file format for your photos meet the requirements for Shutterfly. Here's an article with additional details: Shutterfly - Uploading Photos

In addition, within that same article we provided, please verify that you're following the appropriate steps to upload your photos in the section that says, "Uploading Multiple Photos" for your Mac.

Best regards.